Ship Features Faster

The Flagpool SDK automatically downloads your feature flag configurations from our global CDN as a lightweight, optimized JSON payload. Updates propagate across our edge network in milliseconds, ensuring your flags are always available—even in the most distributed environments.

Once downloaded, the SDK maintains a local cache of all feature flag values and targeting rules. This cache persists in memory and optionally on disk, enabling your application to continue operating seamlessly even during network interruptions.

When your application requests a feature flag value with getFlag(), the SDK evaluates the request entirely locally—no network calls, no round trips, no waiting. The evaluation engine processes targeting rules, user attributes, and percentage rollouts in microseconds.

Flagpool never uploads user data or evaluation results back to our servers. All flag evaluations happen locally within your application's runtime, keeping sensitive user information exactly where it belongs—under your control. Only anonymous usage metrics are transmitted, and even those are optional.

The evaluation logic is identical across all platforms, SDKs, and environments. Whether your application runs on web, mobile, server, or edge, the same user with the same attributes will always receive the same flag values—guaranteed. This deterministic behavior ensures predictable rollouts and eliminates cross-platform inconsistencies.